I don't know anything about the Borla setup, but in general I love Individual Runner (IR) intakes. It baffles me that Ross has not seen good torque with the Borla, because my experience has been the exact opposite, where a good IR intake will always come out on top in torque production. When I wrote my book and tested the Weber setup on my 500 HP 390 stroker, it slaughtered every other manifold in torque. Same thing with the IR intake I built for my cylinder head package; at 765 foot pounds out of a 511" engine, it made HUGE peak torque. The tunnel ram was right there with it, but for a manifold that fits under the hood, the IR intake is pretty tough to beat.
At Drag Week in 2009 I ran a Hilborn setup converted to EFI in my 64 Galaxie. That engine idled at 750 RPM and made 900+ HP, and at 3935 pounds ran 9.50s at 140-143 MPH. It was beautifully streetable, and picked the front wheels a foot off the ground at the track, if I wasn't careful with it.
Any EFI system should work fine for an IR setup. I have used FAST and Amp EFI's system with good results, but no reason the Holley setup couldn't work too.
Throttle response from an IR intake is also outstanding, better than any carbed intake in my experience.
There are downsides, though. The power output of an IR setup is very peaky; see the graph below showing the IR setup for my cylinder heads plotted with the tunnel ram. Talk about a roller coaster! And Ross is right on point with the linkage issues. Getting all 8 throttle plates synchronized can be an issue; I used to use the old trick of setting the throttle stops so that a strip of newspaper would just barely slide out between the butterflies and the throttle bores. Much more than that and your idle will go way, way up. Also, it takes a lot of spring to close 8 butterflies, so your linkage needs to be up to snuff. One linkage trick is to arrange the bellcranks so that the first 1/3 of pedal travel only opens the butterflies a little bit. This makes the engine much easier to control.
Again, I'm not familiar with the Borla setup, but unless it is badly screwed up I think it should act similarly to other IR intakes that I've run. I think if you go for it, you will love it - Jay